forked from zhurui/management
89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
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'use strict';
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/**
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* SVGO is a Nodejs-based tool for optimizing SVG vector graphics files.
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*
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* @see https://github.com/svg/svgo
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*
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* @author Kir Belevich <kir@soulshine.in> (https://github.com/deepsweet)
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* @copyright © 2012 Kir Belevich
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* @license MIT https://raw.githubusercontent.com/svg/svgo/master/LICENSE
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*/
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var CONFIG = require('./svgo/config.js'),
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SVG2JS = require('./svgo/svg2js.js'),
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PLUGINS = require('./svgo/plugins.js'),
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JSAPI = require('./svgo/jsAPI.js'),
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encodeSVGDatauri = require('./svgo/tools.js').encodeSVGDatauri,
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JS2SVG = require('./svgo/js2svg.js');
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var SVGO = function(config) {
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this.config = CONFIG(config);
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};
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SVGO.prototype.optimize = function(svgstr, info) {
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return new Promise((resolve, reject) => {
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if (this.config.error) {
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reject(this.config.error);
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return;
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}
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var config = this.config,
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maxPassCount = config.multipass ? 10 : 1,
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counter = 0,
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prevResultSize = Number.POSITIVE_INFINITY,
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optimizeOnceCallback = (svgjs) => {
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if (svgjs.error) {
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reject(svgjs.error);
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return;
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}
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if (++counter < maxPassCount && svgjs.data.length < prevResultSize) {
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prevResultSize = svgjs.data.length;
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this._optimizeOnce(svgjs.data, info, optimizeOnceCallback);
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} else {
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if (config.datauri) {
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svgjs.data = encodeSVGDatauri(svgjs.data, config.datauri);
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}
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if (info && info.path) {
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svgjs.path = info.path;
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}
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resolve(svgjs);
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}
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};
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this._optimizeOnce(svgstr, info, optimizeOnceCallback);
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});
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};
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SVGO.prototype._optimizeOnce = function(svgstr, info, callback) {
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var config = this.config;
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SVG2JS(svgstr, function(svgjs) {
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if (svgjs.error) {
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callback(svgjs);
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return;
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}
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svgjs = PLUGINS(svgjs, info, config.plugins);
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callback(JS2SVG(svgjs, config.js2svg));
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});
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};
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/**
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* The factory that creates a content item with the helper methods.
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*
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* @param {Object} data which passed to jsAPI constructor
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* @returns {JSAPI} content item
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*/
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SVGO.prototype.createContentItem = function(data) {
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return new JSAPI(data);
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};
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SVGO.Config = CONFIG;
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module.exports = SVGO;
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// Offer ES module interop compatibility.
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module.exports.default = SVGO;
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